Burglar alarm



A. PELLETIER BURGLAR ALARM Filed Oct. 6, 192

20 25 0 ,2 m 27 IIYVENTOR. b 2 Y A.Pe;iei5efi Patented July 24-, 11923.,

ALPHONSE PELLETIER, OF NORWALK, CALIFORNIA.

B neLAn. ALARM.

Application filed October 6, 1921. Se1ia1 No. 505,704.

To all whom it may concern Be it known that I, ALPHONSE PELLETIER, a subject of the King of Great Britain, residing at Norwalk, in the county of'Los Angeles and State of California, have in vented new and useful Improvements in Burglar Alarms, of which the following is a specification. j v i My invention relates to a burglar alarm of the type wherein a cartridge or like explosive member is util zed for giving a warning signal when the'al'arm device isactuated, the principal objects of my invention being to provide a relatively simple and practical device: that may be positioned at i With the foregoing and other objects in view, my invention consists in certain novel features of construction and arrangement of parts that will be hereinafter more fully described and claimed and illustrated in the accompanying drawings, in which:

"Fig. 1. is a perspective view of the corner of a room and showing a burglar alarm of .mv improved construction positioned on the fldor of the room with connectionsleading from said alarm to the doors and windows of the room. j

Fig. 2. is a side elevational view of-the burglar alarm of my improved construction. i i

Fig. 3. is a vertical section. taken through the center of the alarm device.

Fig. 4. is an enlarged vertical section taken on the line H of Fig. 2. TH

Referring by numerals to the accompany-- ing drawings which illustrate a practical embodiment of my invention, 10 designates the base plate of the device, the end portions thereof being provided with apertures 11, that'are adapted to receive screws or like fastenin devices when the alarm device is anchore to a fixed object.

Formed 'in the center of plate 10 is an opening 12, and extending upwardly from said plate, directly in front of said opening is atransversely disposed is formed an aperture 14:. Formed integral with and projecting upwardly to' the sides of opening 12, and to the rear of plate 13 are plates 15,' betweenwhich is. arranged for operation a cartridge striking member or hammer l 6, and which latter is pivotally mounted on a pin 17 that is seated in the plates 15.

of hammer 16, is a lug18fthat is adapted to pass through aperturev l4, and, strike against the cartridge that is positionedin the device. i

the lower portion of said hammer is a lug 20.

plate" H 05 Projecting forwardly fronithe front edge.

I Formed integral with? the rear portion ofg hammer 16 and projecting outwardly and upwardlytherefrom is a short arm 119,;aiid projecting downwardly and rearwa-lC y from I v Secured in any suitable manner to the top, of plate 10 behind the end of opening .1 2 is one end of a fiat spring 21, the free end. of which extends forwardly through opening 12 and said free end bearsldirectly against hammer 16.

Pivotally connected device comprising a plate 22, the lower'por- 80 I the edge of lug 20, and the lower Lend of: 1,

to plates 15 i to (the rear of hammer 16 is a hammerretaining tion of which is provided with ani'opening 23 that is adapted to receive the 'endyof arm 19 7 when the hammer isturned wrear wardly into set posit1on, an'd the upper end of said plate 22 is provided with anapertime 24: to which, is connected one end of a flexible member 25. This flexible jinember may be in the form of a strong cord or sm all wire cable, and it is led from the alarm de vice through suitably located screw eyes, or

like supports, across windows,w doors, skylights, and other openings, the arrangement being such that if any of'the windows ,or

doors are opened or partially opened, the

flexible member 25 will be drawn away from the alarm device so as to disengageplate 22 from the arm 19 of hammer 1 5, and consequently permitting said hammerto be swung fo'rward against plate 13 v uiider the influence of spring, 21

Formed on the forward end of .platd -LLO are laterally projecting ears 26 thatserve as a support for the-rear endof a barrel 27,

the latter being provided at itsrear end with a chamber 28 that is adaptedfm 1receiver, a blank cartridge. i 1 A one side of t rear portion of the'ii e tel 27 is provided'with a laterally projecting lug 29 that is pivotally connected to one of the cars; 26 by a pin or rivet 30, thereby enabling the barrel to be swung horizontally into a position at righta'nglesdto the plate 10 so that a cartridge may be positioned within or removed from chamber 28. Formed on the other side of the rear portion of barrel 27 isa laterally projecting ear 31 that is adapted to overlie the corresponding ears 26, and formed through these ears, are apertures 32 that are adapted to receive a retaining device, preferably a cotter pin 33. I I

To load and set my barrel 27 to be swung into a position at right, angles to plate 10, and secured in such position by theinsertion of cotter pin 33 through apertures 32. Hammer 16 is now drawn rearwardl-y, and the arm 19 is engaged by retaining plate 22. c

As the hammer is thus drawn rearwardly in the fset position, lug 20 on the lower end ofsaid hammer bears downwardly on the free'end of spring 21, thereby placing said spring under tension.

As retaining plate 22 is swung into position to engage the arm 19 of hammer 16, the 'fiexible member 25 is drawn, into taut condition, and thus the device is set or made ready for operation. c f In, the event that any of the protected windows or doors are opened, flexible mem- 35 ber 25 will be drawn away from the alarm device, thereby disengaging plate 22 from the .arm 19, and the power stored in spring 21'will throw the hammer forwardly so that lug 18 will strike against the rear end of the cartridge, thereby exploding thelatter and giving an alarm.

The burglar alarm otmy improved con- 'struction isrelatively simple, may be easily and cheaply produced, and is very effective 'in performingits intended functions.

It will be understood that minor changes in the size, formand construction of the various parts of my improved burglar alarm,

may be made and substituted for those here in shown and described without departing from the spirit of my invention, the scope of which is set forth in the appended claims.

'I claim as my invention:

1 In a burglar alarm, a base, a barrel pivotallymounted on said base andadapted to swing in a horizontal plane, said barrel being provided withyacartridge receiving cha nber, a hammer pivotally mounted on the base and adapted to engage the cartridge positioned within the barrel, a pivotally mounted member on thebase for engaging and retaining the hammer in. set position,

and .means' for moving said member todis- -'en'gaging position with respect: to said ham- I improved 1 burglar alarm, cotter pm 33 1s withdrawn'to permit 2. In a burglar alarm, a base, a barrel pivotally mounted on said base and adapted to swing in a horizontal plane, said barrel being provided With a cartridge receiving chamber, a hammer pivotally mounted on the base and adapted to engage the cartridge positioned with the barrel, a pivotally mounted member on the base "for engaging and retaining thehammer in set position,

and a flexible member connected to, the hammer retaining member for moving the latter to releasing position. j I

i 3. In a burglar alarm, a base plate, a plate projecting upwardly from said base'plate there being an opening formed in said up wardly projecting plate, a barrel ivotally connected to the base plate, and a apted to swing in a horizontal plane, the rear portion to the rear of the vertically disposed plate, 7

and having a portion that isEadapted to pass through the opening in said vertically disposed plate, and releasable means for retaining the hammer in a predeterminedposition.

4:- In a burglar alarm, a base plate, a plate projecting upwardly from-said base plate, there being an opening formed in said upwardly projecting plate, a barrel'pivotally connected to the base plate, and adapted to swing in a horizontalpla'ne, the rear portion of said barrel beingprovided withv a cartrldge receiving chamber, the rearend of which communicates with the opening in the vertically disposed plate,'a springactuated hammer pivotally mounted on the base plate to the rearof the vertically disposed plate, which hammer is provided with a portion that is adapted to pass through the opening in said vertically disposed plate, ahammer retaining member pivotally mounted on the base plate for engaging andretaining said a hammer in set position, and means for moving said member to a releasing position with respect to the hammer.

5. In a burglar alarm, a base plate, a,

plate projecting upwardly from said" base plate, there being-an opening formed in said upwardly projecting plate, a barrel pivotally connected to the base plate, and, adapted to swing in a'horizontal plane, the rear portion of said barrel. beingprovided with a cartridge receiving chamber, the rear end of which communicates with the opening in the vertically disposed plate, a spring actuated hammer pivotally mounted on the base plate to the rear of the vertically disposed plate, which hammer is provided. with a vportion that is adapted topass through the opening in said vertically disposed p1ate,a hammer retaining member pivotally mounted on the base plate for engaging, and retaining-said hammer in set position, and a flexible member connected to said hammer retaining member for moving the latter to releasing position.

6. A burglar alarm comprising a plate projecting upwardly from the base and having an opening formed therein, a barrel sustained on the base and provided with a cartridge receiving chamber which communicates with the opening in said plate, a spring actuated hammer pivotally mounted on the base to the rear of said plate and having a pin that is adapted to pass through the opening in said plate, and releasable means for retaining the hammer in a predetermined position.

7. A burglar alarm comprising a base, a plate formed on the base having an opening therein, a barrel pivoted on the base to 00- cupy one position in which its bore is in registration with the opening in said plate and another extreme position in which the bore is disposed at an angle with respect to the opening of said plate to allow of the insertion or removal of the cartridges to or from the bore, a hammer pivoted to the base and including a pin" adapted to extend through the opening in said plate against the cartridge when the hammer is in active position, means normally retaining the hammer in inactive position, means for urging the hammer to an active position, and means for moving the first means to releasing position whereby the second means is allowed to function. I

In testimony whereof I have signed my name to this specification. I

ALPHONSE PELLETIER. 

